Improved door-spring



fili-cited tata 'a1-ent camine.

FREDERICK DoDGEoE sYRAcUsE, NEW YORK.

Leners Pmt1vo94,949, dated samba 2i, 1869.

The Schedule refen'nd to in these Letters Patent-and making part of the same.

HOW-

Be it known that I, FREDERICK DonGE, of Syracuse, in the countyof Onondaga,- and State of New York, have invented certain new and useful Improvei when brought into another position.

To effect this I form a curved rail or bar, a, which l firmly affix `by its twoY ends to the dooriframe, just above the top of the door.` The outline of this rail a is clearly represented in iig. 2, from 1 to 2.

This bar forms a curve concentric, or nearly so, with the pivot of the door-hinge, from 2 to 3. The, inner edge of the har curves or flares outward from said' last-named curve, and at' the end of this curve, at 5, there is a recess. l

Against the inner or concave edge of the bar or rail a, a roller, b, rests, and runs along 4said rail, against which it is madefto'press, inthe manner and' for the purpose about to be described. g

The roller'b is on the upright stud projecting from one end of a horizontal lever, c, which spivoted by its othei` end to a socket, d, that isl affixed to the door below. i

A spiral spring, e, is fastened by one end to the stud that bears roller b, its opposite end 'being hooked on' to acatch, f, on the door.

j; has several holes in it, to adjust the spring to the proper tension.

There can be a slight recess at 2, in 'the rail, to hold the door at that point, and the curve may iiare so as to throw the door back as well as forward.

It will be seen, from the above construction and ar,- rangeinent, that When the roller is upon the conceitl tric part of the rail, there will beno tendency to throw the door to, but when it reaches the flaring part, the spring drawing upon theroller will close the door with a force equal to the tension of the spring.

.the roller.

tounine have-been constructed before, in which,l1ow

ever, the friction -roller and staple were attached closely to the door.

My` improvement consists in the extended socket d,

, attached to the door, by means of which a greaterleverage is secured, in combination with the pivoted its equivalent. i

What I-desire to claim, therefore, is-

Witnesses JNO. D. McGowan, GEO. S. LEONARD.

The `plate i, that connectsv thespring with the catch Itis obvious another spring can be used to actuate I am aware that door-fastenings similar in principlel cranks, as a means of attaching the spring-plate, or`

In a door-spring, constructedv substantially as de- 'd scribed, attaching the spring-plate, or its eqnivalent,. f to the door, by means ofthe extended socket and the 

